Walter m



' Dec. 10,1929. M; HOWSER &17,516

. FILE HOLDER Original Filed Au 16. 1927 j MJOn Ser Reined Dec. o, 1929 i UNITED STATES PATENT OFFICE WALTEB. M. HOWSEB OF INDIANAPOLIS, INDIANA FILE EOLDEB.

na ,ea,sos, dated november 13, 1925, Serial no. zssea'aea August s, 1927. Application tor xessue filed January 24, 1929. Serial No. :84,816.

relates to file holders and This invention of the stem reduced extension 11, so that ml-e particularly to a device of this characthe spider may seat upon the shoulder 14 :use in simultaneously holding a'pluformed by the reduction of the stem and 'f ty'offlles for rotative action upon a snrbet ilgamped rigidly thereagainst by the me. nu' i ?in 'of the invention is i The spider 13 comprises a hub portion top'r a' device 'of this character 1Il from which radiate uniformly spaced arms which the 'single of the supported files 'may 15. The outer end and under face of each b 'readly 'aitered to suit the surface which :3 16 be acted upon whereby the tool may be" con eniently -enxployed in breaking 'the on the va ve seats 'of internal eombusarm is provided with afile receiving channel 16 producing spaced flanges 17. The inner ends of the arms are pierced vertically extendingbores 18 and from t e base of the channels 16 to the bores 18, the arms are split, as at 19. Inwardly of the channels, each arm is provided' with a bore 20 for the reception of a binding screw 21; the bore 20 at one side "of the' split 19 permitting 'rotationof' the bolt and at the opposite side of the split 'being threaded for coaction therewithso thatuthis bolt maybe n engues. A further .object of the invention is to lvide a device of this character which y 'be 'readily and eheaply constructed, ihh 'is le in its operatomand'which 'be reafl ada ted or fitted for use in the treatment ova ve seats, the guide bores of which .var'yin size. 1'h'ese and 'other objects I attainby 'the 'on shown in the accompan ing j winggwherein 'for the n-pese of i ust'ion s showna preferre emhodment of 25 %inveton and whtereiz-` ig.,1 is ajertical sectonal View showing hider constructed' in accordance w th y' inventionj applied to treat a ortion of p e Wall of the ive chamber o an interto %ti combistion engine, one of the files bespht and thus cause the adjacentfianges 17 to approach one another and clamp the file F intermediate its ends to expose a full lonitudinal element thereof. Herein a flat le of square Outline in cross-section is illustrated and as will be apparent after one face of the file has become dulled, another face of the same file may be presented. As shown in Fig. 2 each clamping Construction mounts a file and exposes a longitudinal element thereof. The several clamping constructons are adjusted upon the head for vertical positioning of the file (see Figtl) or may be positionecl to hold the files in inclined relation to the stem as shown in Fig. 3.

It 'will heobvious that in breaking the glaze of or removing carbon from the valve seats or the adj acent portions of the gas conducting Channels of internal combustion engines, the stem 10 may be extended into the guides, 'files F placed in the channels 16 of the arms, fit-ted against the surface which is to he operated upon and Secured by adjusting the clamping screws 21. The nut" 12 is preferably of such size that it may be conveniently engaged by the type of wrenchordinarily known n 'the automobila industry as L shown as applied and the remaining osremoved from the device; g. ?isa plan' view'of the'file haider;

'Tig. 3 is a vertical sectional view there- "f i is a lan view "of .an alternative %oi-in of'file -w 'ich may beemployed when tre-e lt s t i;

%fis a sectional View therethrpu h;

5 ,and 'Tare views of bushings w ich employed for guiding ,the stem m "jbores q a 'r''in .no more' particular to the mta ge d en a riesa stnha i gat ita lpper 'gn 1),the rtermnai r orton. ofwhch s *y screw-threadedfor the recepton 'tb able nut 12 The character gn ly signates a s ider or head i 'the passage employed to constrict'the opening at the a speed wrench, thereby enabling the device to be rapidly and conveniently rotated.

For use in dressing valve seats, file struc tures generally shown at F' may be employed.

his comprises a disk adapted toreplace the spider 13 upon the stem 10 having a conical periphery 22 formed as a file for coaction with the valve seat. To enable the stem 10 to be fitted in bores of different diameters, bushngs such as illustrated in Figures 6 and 7 a at 23 may be employed. Where the bores are closely related as to diameter, stems of different sizes may be employed.

It will be obvious that a device of this char- -cter may be very readily and cheaply produced and maybe re'adily prepared for use upon any given surface byanyone who is in any way familiar Wj th the handling of tools.` It will'` also be obvious that the construction hereinbefore set forth is capable of a certain range of change and modification without materially depaIting from the spirit of the invention and I accordingly do not limit myself to such specific` structureexcept ashereinafter claimed.` I

I claim z y a v 1. In a rotatable file holder for holding files, a coaxial stem having at one end a plu- 4 rality of radiating arms, the outer end of each arm having an outwardly opening file receivng groove, said grooves being substantially equi-distant from the stem axis to present a series of filing' elements exteriorly of the device for simultaneousand rotative operation GLI ,arms for cl upona circumscribingsurfacesaid arms be-` ing split, and means for contracting the split ends of the arms to clamp the files engaged therewth. p v a p 2. In a rotatable file holder for holding files, acoaxial stem having at one end a plurality of radiating arms the outer end of each arm having an outwardly opening file receiving groove, said grooves being substantially equi-distant from the stem axis to present' a ;eries of filing elements exteriorly of the device for ,simultaneous and rotative operation upon a circumscribing surface, said arms be ing split to permit their -contracton upon a file supported in the groove, and means for contractin'g the arm, said grooves extending across the outer ends and "under faces of the arms to thereby per-mit the file to be disposed in a desired angula'r relation to the aXis of the stem. i i

3. In a device for holding files for use in treating lindric or conic, faces such as valve seats and ports and wherein the face to 'be treated has associated therewith a bore which is coaxial, a stem adapted to engage in the` bore, a spider Secured to the stem athone end thereof and embodying radiating arms, and means opening outwardly at the outer ends of said amping supporting files in a desired angular relation to theaxis of stem and elatively small circumscribing cythe bottom of said head exposing a series of separated filing elements exteriorly of the device permitting circumscribing surface o eration. i

4. In a device or holding files for use in treating relatively lindric or conic faces such as valve seats and ports and wlerein the face to be treated has associated therewith a bore which is coaxial, a stem adapted to engage in the bore, a spider secured to the stem at one end thereof and embodying radiating arms, the outer end of each arm having a file receving groove, said arms being split and opening outwar'dly'to present a series of filing elements exteriorly of the device for `rotative operation upon a circumscribing surface, and means for contracting the split ends of the 'arms to contract said ends and clamp files disposed within the grooves. i'

'5. A rotatable unitary device of the character described including a supporting head, a central and coaxial tool engageable portion uponthe top of said head, an elongated coaxial stem projecting from the bottom of said head, and a plurality of file clamps supported by the headand each opening outwardly and arranged to rigidly and laterally g'rip a file having an uninterrupted peripherally -enveloping filing surface by partially embracin the same for exposing an entire longitudina filing surface element thereof whereby a se: ries of separated filing surface elements is ex# posed exteriorly of the 'device' 'for rotative operationupon a circumseribing surface'. 6. A rotatable unitary device of the character described including in combination a supportin head, a central and coaxial tool engageab e portion upon the top of said head,

an elongated coaxialstem roje'ctin from the bottom of said head, an a luralty of file clamps supported by the head and each open.- ing `outwardly and arranged laterally, grip a file havin peripherally enveloping fi in surface by par'- tially embracin the same %or exposing an entire longitudnal filing 'surface element thereof whereby a series of separated .filing elements is exposed exteriorly of the device for rotative 'circumscribing surface operation, said file clamps being arranged in s aced relation about said head and equi-dstant from the axisof said stem'.

7 A rotatable unitary device of the character described including in combination a supporting head, a central and coaxial tool engageable portion upon the top of said head, an elongated coaxial stem projecting from v and a plurality of file clamps' supported b `said head and each opening outwardly an arranged to and laterally grip by partial'embracement a. file having an uninterrupted peripherally enveloping filing surface and exposed substan- ,an uninterrupted tially an entire longitudinal filing surface' to rigidly and filing elements is exposed exteriorly of the device for rotative circumscribing surface operation, said file clamps being arranged to position said file in inclined relation to the stem axis, the projections from a plurality of the files having a common intersection with the stem axis.

8. A rotatable unitary device of the character described including in combination a supporting head, a central and coaxial tool engageable (portion upon the top of said head, an elongate coaxial stern projecting from the bottom of said head, and a plurality of file clam s pivotally supported by said head upon axes aving a common plane transverse to the stem axis, each clamp opening outwardly and part-ially embracing a file having an unnterrupted peripherally enveloping filing surface for laterally and rigidly clamping the same and exposing substantially an entire longitudinal filing surface element thereof, whereby ai 'series of separated filing elements is expose'd exteriorly of the device for rotative circumscribing surface operation.

9. A rotatable unitary device of the character described including in combination a supporting head, a central and coaxial tool` en gageable ortion upon the top of said head, 'an elongate' coaxial stem projecting from the :e bttm of said head, and a plurality of file clamps supported by the head and each openjing outwardly and arran ed to rigidly grip intermediate the ends a le having an uninv terrupted peripherally enveloping filin surface and expose substantially an entire ongitudinal filing surface element thereof whereby a' series of separated filing elements is exposed exteriorly of the device for rotative circumscribing surface operation.

10. A rotatable device of the character described including in combination a supporting head, a central and coaxial tool engageable portion upon the top of said head an elongated coaxial stem projecting from the bottom of said head, and a plurality of file clamps a supported by the head and each opening outwardly and arranged to rigidly grip intermediate the ends a file having an uninterrupted peripherally enveloping filing surface and exose substantially an entire longitudinal filing surface element thereof Whereby a series of separated filing elements is exposed exteriorly of the device for rotative circumscribing surface operation, said file clamps i being arranged in spaced relation about sad head and equi-distant from the axis of said stem.

11. A rotatable unitary device of the character described including in combination a supporting head, a central and coaxial tool engageable portion upon the top of said head, an elongated coaxial stem projecting from the bottom of said head, and a plurality of file clamps supported by said head and each open- 05 ing outwa'rdl and arranged to rigidly grip intermediate the ends a file having an uninterrupted peripherally enveloping filing surface and expose substantially an entire longitudinal filing surface element thereof Whereby a series of separated filing elements is exposed exteriorly of the device for rotative circumscribing surface operation, said clamps being arranged to position the files in inclined relation to the stem axis, the projections from a plurality of the separated filing surface elements having a common intersection with the stem axis.

12. A rotatable unitary device of the character described including in combination a supporting head, a central and coaxial tool engageable portion upon the top of said head, and a plurality of file clamps pivotally supported by said head upon axes having a common plane transverse to the stem axis each clamp opening outwardly and being arranged to rigidly grip intermediate the ends a file having an uninterrupted peripherally enveloping filing surface and expose substantially an entire longitudinal filing surface element thereof whereby a series of separated filing elements is exposed exteriorly of the device for rotative circumscribing surface operation In witness whereof, I have hereunto aiiixed my signature.

WVALTER M. HOWSER. 

